CN203032154U

CN203032154U - Chalk cap

Info

Publication number: CN203032154U
Application number: CN 201220690080
Authority: CN
Inventors: 高芯莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-14
Filing date: 2012-12-14
Publication date: 2013-07-03
Anticipated expiration: 2022-12-14

Abstract

The utility model relates to a chalk cap which comprises a barrel-shaped chalk cap body. At least two threads are placed in the chalk cap body. When the chalk cap is used, chalk is screwed in an inner cylinder of the chalk cap along the threads, and then the chalk is clamped and not easy to drop and can only being taken out by rotating, and the length of the chalk is adjustable, and therefore the chalk cap is easily used for writing. The chalk cap is light in structure, wide in application and easy to popularize.

Description

Chalk sleeve

Technical field

The utility model belongs to a kind of educational aid, more particularly, is a kind of for the chalk sleeve that grips chalk.

Background technology

Now, chalk is write facility with wiping with it, is still playing the part of important role in the writing of teaching, yet the composition of chalk is generally calcium carbonate, injures finger skin easily, directly the contact chalk is also very unhygienic for finger, and the chalk powder of being infected with also is not easy to wash to dispel.Though more existing chalks can be nested into chalk wherein, often can not fix with chalk securely simply again, chalk easily therefrom drops out, and chalk sleeve is difficult for putting.

Summary of the invention

The utility model provides a kind of chalk sleeve for solving the technical problem that exists in the known technology, and this chalk sleeve structure is light and handy, simple to operate, can arbitrarily put, and can easily chalk is tightened and not be drawn out easily.

The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:

A kind of chalk sleeve comprises chalk sleeve body cylindraceous, and described chalk sleeve body madial wall is provided with the screw thread that is no less than twice.

Its beneficial effect is: this chalk sleeve structure is light and handy, and during use, as long as chalk is prolonged the inner core that screw thread rotation is advanced chalk sleeve, like this, chalk can be fixed, and chalk is not easy to drop out, and can only be rotated taking-up, and the adjustable length of chalk, is easy to write.

As a kind of improvement of the present utility model, described chalk sleeve body bottom is provided with through hole.After adopting this structure, behind the taking-up chalk, can wash chalk sleeve for water, can make flowing water sweep along the chalk powder in the chalk sleeve from through hole, to flow out, make chalk sleeve more easy to clean.

As a kind of improvement of the present utility model, described chalk sleeve body outer wall has and is no less than two skid resistant courses that are made of band.After adopting this structure, skid resistant course has strengthened the friction between finger and the chalk sleeve, makes chalk sleeve be difficult for slipping out of the hand.

Description of drawings

Fig. 1 is front view of the present utility model;

Fig. 2 is upward view of the present utility model.

Among Fig. 1～Fig. 2: 1. chalk sleeve body; 2. screw thread; 3. through hole; 4. skid resistant course.

The specific embodiment

For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:

Please refer to Fig. 1-Fig. 2,

Embodiment 1, and a kind of chalk sleeve comprises chalk sleeve body 1 cylindraceous, and chalk sleeve body 1 madial wall is provided with the screw thread 2 that is no less than twice.

During use, as long as chalk is prolonged the inner core that screw thread rotation is advanced chalk sleeve, like this, chalk can be fixed, and chalk is not easy to drop out, and can only be rotated taking-up, and the adjustable length of chalk, is easy to write.

Embodiment 2, and preferred, chalk sleeve body 1 bottom is provided with through hole 3.During use, behind the taking-up chalk, can wash chalk sleeve for water, can make flowing water sweep along the chalk powder in the chalk sleeve from through hole, to flow out, make chalk sleeve more easy to clean.

Embodiment 3, and is preferred, and chalk sleeve body 1 outer wall has and is no less than two skid resistant courses 4 that are made of band.

The utility model is not limited to the above-mentioned specific embodiment, the simple modification that does not embody novelty, equivalent variations and the modification of any size for chalk sleeve, screw thread, skid resistant course, quantity and arrangement architecture that every foundation technical spirit of the present utility model has been done all belong to the category of the technical solution of the utility model.

Claims

1. a chalk sleeve comprises chalk sleeve body cylindraceous (1), it is characterized in that: described chalk sleeve body (1) madial wall is provided with the screw thread (2) that is no less than twice.

2. chalk sleeve according to claim 1 is characterized in that: be provided with through hole (3) bottom the described chalk sleeve body (1).

3. chalk sleeve according to claim 1 is characterized in that: described chalk sleeve body (1) outer wall has and is no less than two skid resistant courses that are made of band (4).